Оч 2 целые 1/3x+1 целая3/10+2 целые 1/5x+2 целые 11/15 при x= 15

1) ( 2 1/3x + 2 1/5x ) + ( 1 3/10 + 2 11/15 ) = ( 2 5/15x + 2 3/15x ) + ( 1 9/30 +
+ 2 22/30 ) = 4 8/15x + 3 31/30 = 4 8/15x + 4 1/30 
2) x = 15 
4 8/15 * 15 = 68/15 * 15 = 68 
3) 68 + 4 1/30 = 72 1/30